DJI Susan Posted at 2017-10-17 02:12
Sir, I have checked your case again, and here is the data analysis result:
1.The aircraft was controlled by pilot in ATTI mode due to no GPS signal.
Dear DJI Susan, Thank you for your response. I understand that DJI could not provide warranty service in this case and I accepted this. I do not claim warranty service anymore. I do not think the crash was caused by the lack of GPS signal. I made that flight knowing that the GPS signal will be weak or no and I will fly in ATTI mode. I have some experience doing this with my Phantom 3 and the conditions were favorable – weak wind about 2 m/s. (note that I am confident in my judgment about the winds because of my 15 years of experience as a paragliding pilot).
I need some more information to complete my “lesson” regarding Spark’s GPS receiver capabilities. These are pictures that give an idea of the surrounding environment on this flight: Is it normal for Spark's receiver not to record GPS coordinates for more than 2 minutes (according to the flight record it is Lat:0.0000000 Lon:0.0000000) while my phone, in a worse position near the rocks, shows 46.546083 N 12.066960 E
And one more question: How to make a picture like this safely? This is a screenshot captured from the official video presentation of Spark and in fact this photo inspired me to get Spark. Obviously it is out of range of the VPS and also the conditions are unfavorable for strong GPS signal. I have done similar shots with my P3 and I know that this situation is not easy to handle. I've never been so brave to get so close to the rock. May be this is my closest one: In such a situation P3 is not able to keep strong GPS signal constantly and I switch it to ATTI mode in order to avoid some GPS glitch (not possible with Spark).
I do think that the more detailed information provided in relation to both questions above will also be useful for other users.
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